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• W4211240596 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> Land evaporation (ET) plays a crucial role in the hydrological and energy cycle. However, the widely used model-based products, even though helpful, are still subject to great uncertainties due to imperfect model parameterizations and forcing data. The lack of available observed data has further complicated estimation. Hence, there is an urgency to define the global proxy land ET with lower uncertainties for climate-induced hydrology and energy change. This study has combined three existing model-based products – the fifth-generation ECMWF reanalysis (ERA5), Global Land Data Assimilation System Version 2 (GLDAS2), and the second Modern-Era Retrospective analysis for Research and Applications (MERRA-2) – to obtain a single framework of a long-term (1980–2017) daily ET product at a spatial resolution of 0.25<span class=inline-formula>^∘</span>. Here, we use the reliability ensemble averaging (REA) method, which minimizes errors using reference data, to combine the three products over regions with high consistencies between the products using the coefficient of variation (CV). The Global Land Evaporation Amsterdam Model Version 3.2a (GLEAM3.2a) and flux tower observation data were selected as the data for reference and evaluation, respectively. The results showed that the merged product performed well over a range of vegetation cover scenarios. The merged product also captured the trend of land evaporation over different areas well, showing the significant decreasing trend in the Amazon Plain in South America and Congo Basin in central Africa and the increasing trend in the east of North America, west of Europe, south of Asia and north of Oceania. In addition to demonstrating a good performance, the REA method also successfully converged the models based on the reliability of the inputs. The resulting REA data can be accessed at <a href=https://doi.org/10.5281/zenodo.4595941>https://doi.org/10.5281/zenodo.4595941</a> (Lu et al., 2021)." @default.
• W4211240596 created "2022-02-13" @default.
• W4211240596 creator A5084564396 @default.
• W4211240596 date "2021-09-07" @default.
• W4211240596 modified "2023-09-23" @default.
• W4211240596 title "Reply on RC1" @default.
• W4211240596 doi "https://doi.org/10.5194/essd-2021-61-ac1" @default.
• W4211240596 hasPublicationYear "2021" @default.
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